Restriction endonucleases from microorganisms isolated in Brazil: an isoschizomer of Hae III from a thermophilic Bacillus SP

The isolation and characterization of a restriction endonuclease from a thermophilic strain of Bacillus is described. The enzyme recognizes the palindromic sequence 5'...GGCC...3' as determined by PEI-cellulose chromatography of pancreativc DNAse and snake venom phosphodieterase digestion products of labelled DNA fragments, analysis of restriction digests and direct sequence analysis. The enzyme, denominated BspBR, is an isoschizomer of HaeIII and BspRI